Runtime Performance Advisor uses Performance Monitoring
Infrastructure (PMI) data to provide recommendations for performance
tuning.
About this task
The
Performance and Diagnostic Advisor uses
Performance Monitoring Infrastructure (PMI) data to provide recommendations
for performance tuning. Running in the Java virtual
machine (JVM) of the application server, this advisor periodically
checks for inefficient settings, and issues recommendations as standard
product warning messages.
Example
The following log file is a sample
output of advice on the
SystemOut.log file:
[4/2/04 15:50:26:406 EST] 6a83e321 TraceResponse W CWTUN0202W:
Increasing the web container thread pool Maximum Size to 48
might improve performance.
Additional explanatory data follows.
Average number of threads: 48.
Configured maximum pool size: 2.
This alert has been issued 1 time(s) in a row.
The threshold will be updated to reduce the
overhead of the analysis.
New feature: This topic
references one or more of the application server log files. Beginning
in WebSphere Application Server Version 8.0 you can configure the
server to use the High Performance Extensible Logging (HPEL) log and
trace infrastructure instead of using
SystemOut.log ,
SystemErr.log,
trace.log,
and
activity.log files or native z/OS logging
facilities. If you are using HPEL, you can access all of your log
and trace information using the LogViewer command-line tool from your
server profile bin directory. See the information about using HPEL
to troubleshoot applications for more information on using HPEL.
newfeat